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Chemical Financial Corporation To Join Nasdaq Financial-100 Index Beginning May 24, 2001

Date 18/05/2001

Chemical Financial Corporation (Nasdaq:CHFC) of Midland, Michigan, will become a component of the Nasdaq Financial-100 Index®, effective at the beginning of trading Thursday, May 24, 2001. Chemical Financial Corporation will replace Unitrin, Inc. (Nasdaq:UNIT), which is de-listing from The Nasdaq Stock MarketSM.

With a market capitalization of $538 million, Chemical Financial Corporation is a multi-bank holding company. Chemical's subsidiaries offer commercial banking and fiduciary services such as business and personal checking accounts, savings and individual retirement accounts, time deposit instruments, electronically accessed banking products, residential and commercial real estate financing, commercial lending, consumer financing, corporate and personal trust services, and other banking services.

The Nasdaq Stock Market lists more than 4,500 companies, has a larger dollar volume, and trades more shares per day than any other U.S. market. For more information about Nasdaq, visit the Nasdaq Web site at www.nasdaq.com or the Nasdaq NewsroomSM at www.nasdaqnews.com.